<template>
  <div id="app">
    <!-- <nav>
      <router-link to="/">Home</router-link> |
      <router-link to="/about">About</router-link> |
      <router-link to="/menu">Menu</router-link> |
    </nav> -->
    <!-- 1级路由出口 -->
    <router-view/>
  </div>
</template>